Ni-Co layered double hydroxide on carbon nanorods and graphene nanoribbons derived from MOFs for supercapacitors

作者：Jin, Hongxing; Yuan, Daqing; Zhu, Shengyun; Zhu, Xiaohong; Zhu, Jiliang^*

来源：Dalton Transactions, 2018, 47(26): 8706-8715.

DOI：10.1039/c8dt01882k

• METAL-ORGANIC FRAMEWORK
• ELECTROCHEMICAL ENERGY-STORAGE
• HIERARCHICALLY POROUS CARBON
• DIRECT CARBONIZATION
• ELECTRODE MATERIAL
• PERFORMANCE
• NANOSHEETS
• NANOTUBES
• TEMPLATE
• FABRICATION

In this study, carbon nanorods (CNR) and graphene nanoribbons (GNR) derived from metal-organic frameworks (MOFs) were first prepared by solvothermal method. Then, Ni-Co layered double hydroxide (LDH)/CNR and LDH/GNR composite materials for supercapacitors were synthesized using a facile co-precipitation method. With the help of GNR, the Ni-Co LDH/GNR composite material showed great specific capacity (1765 F g(-1)), rate performance (68% capacity retention when current density increased from 1 to 20 A g(-1)) and cycling stability (83% capacity retention after 2000 charge-discharge cycles at 5 A g(-1)). Furthermore, an asymmetric supercapacitor (ASC) with Ni-Co LDH/GNR as positive and activated carbon (AC) as negative electrodes was fabricated. The ASC device delivered a high energy density of 25.4 W h kg(-1) at power density of 749 W kg(-1) and exhibited excellent cycling stability (96% specific capacity retention after 5000 cycles).

• 出版日期2018-7-14
• 单位中国原子能科学研究院; 四川大学